Photovoltaic energy storage power generation main energy storage technology

Photovoltaic energy storage power generation main energy storage technology

my country's photovoltaic industry has great potential for development. Do you know what are the main energy storage technologies for photovoltaic energy storage power generation?

Pumped water energy storage: Pump water for energy storage when the power supply of the grid is excessive, release water for power generation when the power supply is insufficient, reduce the impact on the grid caused by the integration of renewable energy power generation into the grid, and keep the power generation of the system in a stable state.

Flywheel energy storage: Flywheel energy storage has the advantages of high power density, long equipment life, clean and environmental protection, strong adaptability, and no need for frequent maintenance. However, flywheel energy storage has low energy density and high installation and maintenance costs. The system is used together.

Compressed air energy storage: When the power consumption is low, the air is compressed and stored by the electric energy and then released during the peak power consumption. The released air is burned and heated to drive the motor to generate electricity.

Battery energy storage: Although lead-acid batteries are cheap, they have a short service life and cause serious environmental pollution; lithium batteries have the advantages of high energy density and long service life, but they are prone to failure or even explosion in short circuit, overcharge and other conditions , has safety hazards; sodium/sulfur batteries have the advantages of large current discharge and long life, but they are easy to cause safety problems when they are overcharged.

Superconducting energy storage: It has the advantages of high energy storage and high charging/discharging efficiency, which can improve power transmission capacity and power quality, but the cost is relatively high.

Supercapacitor energy storage: Supercapacitors store charges on the plates, and their charging and discharging are physical processes, which are mainly suitable for occasions with high power and small capacity.